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ACCOMMODATIONS:
  • Main
    Beach
  • North
    Beach
  • South
    Beach
  • Cottage
    Colony
  • Complimentary
    Activities
  • Main
    Beach
  • North
    Beach
  • South
    Beach
  • Cottage
    Colony
  • Complimentary
    Activities
RESERVATIONS
(712) 332-5646

Day: September 29, 2026

West Lake Okoboji: What to Know About Iowa’s Deepest Lake

West Lake Okoboji shoreline at Fillenwarth Beach, Arnolds Park, Iowa

The deepest natural lake in Iowa at 138.9 feet, cut by a glacier in a way nobody could explain until this summer. What is true about the water, and what has been repeated wrong for a century.

Come to Okoboji and be our guest!

Fillenwarth Beach is a family-owned and operated lakeside resort on West Lake Okoboji in Arnolds Park, Iowa. Our resort accommodations are fully-furnished cottages, studios, and apartments located on the lakefront or nearby with West Lake Okoboji access.

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FILLENWARTH BEACH

Our excellent location provides easy access to the best activities offered in the Iowa Great Lakes Region, and experiences that will keep you coming back for more!

LOCATE FILLENWARTH

CONTACT US

  • Address: 87 Lakeshore Drive
    PO Box 536
    Arnolds Park, Iowa 51331
  • Phone: (712) 332-5646 | Toll Free: (800) 332-7236
  • Email: info@fillenwarthbeach.com

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RESERVATIONS
(712) 332-5646
ACCOMMODATIONS:
  • Main Beach
  • North Beach
  • South Beach
  • Cottage Colony
  • Complimentary Activities
  • Reservations
  • Guest Info
    • History
    • Faq
    • Policies
    • Accessibility
    • Area Links
    • 7 DAY WEATHER FORECAST
    • 7-DAY WIND FORECAST
    • WEST LAKE LEVEL & TEMP
    • WATER SAFETY COUNCIL
  • Gallery
  • Location
  • Blog
  • Contact Us
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